Engine Safety (Supplementary) USCG Question #710 (Set 9)

The illustration shown describes a _______. MO-0069

USCG Exam Illustration MO-0069
USCG Examination Diagram: Illustration MO-0069
Official USCG Answer & Rule Citation

Correct Answer: Option D — two cycle opposed piston diesel engine

Opposed piston engines utilize two pistons moving in opposite directions within a single cylinder barrel, eliminating conventional cylinder heads. When configured with scavenge ports and exhaust ports timed by the opposing pistons operating on a two-stroke cycle, it is classified as a two-cycle opposed piston diesel engine.

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